The genus Salmonella is a member of the family Enterobacteriaceae. Salmonella species are motile Gram-negative rods and are facultative anaerobes. Disease causing Salmonella species have recently been re-classified into a single species, Salmonella enterica, which has numerous serovars. Salmonella virchow causes enteritis in man. This infection is often mild and self-limiting, but can be severe in the young, the elderly and those with underlying disease. S. Virchow infection is more often characterized by bloodstream invasion compared with the majority of salmonella serotypes.